LWG3842 Unclear wording for precision in chrono-format-spec

Author: burblebee

source/time.tex

@@ -10478,10 +10478,11 @@
 are described in \ref{format.string}.
 Giving a \fmtgrammarterm{precision} specification
 in the \fmtgrammarterm{chrono-format-spec}
-is valid only for \tcode{std::chrono::duration} types
-where the representation type \tcode{Rep}
-is a floating-point type.
-For all other \tcode{Rep} types,
+is valid only for types that are
+specializations of \tcode{std::chrono::duration}
+for which the nested \grammarterm{typedef-name} \tcode{rep} denotes
+a floating-point type.
+For all other types,
 an exception of type \tcode{format_error} is thrown
 if the \fmtgrammarterm{chrono-format-spec}
 contains a \fmtgrammarterm{precision} specification.